CN211283733U - Low-consumption high-purity variable-pressure nitrogen making device - Google Patents
Low-consumption high-purity variable-pressure nitrogen making device Download PDFInfo
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- CN211283733U CN211283733U CN201921532943.3U CN201921532943U CN211283733U CN 211283733 U CN211283733 U CN 211283733U CN 201921532943 U CN201921532943 U CN 201921532943U CN 211283733 U CN211283733 U CN 211283733U
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- China
- Prior art keywords
- adsorption tower
- gas circuit
- molecular sieve
- air outlet
- air
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 31
- 238000001179 sorption measurement Methods 0.000 claims abstract description 83
- 239000007789 gas Substances 0.000 claims abstract description 65
- 239000002808 molecular sieve Substances 0.000 claims abstract description 38
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000011010 flushing procedure Methods 0.000 claims abstract description 5
- 230000003584 silencer Effects 0.000 claims description 3
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Separation Of Gases By Adsorption (AREA)
Abstract
The utility model discloses a low-consumption high-purity variable-pressure nitrogen making device, belonging to the technical field of nitrogen preparation. The molecular sieve adsorption tower comprises a molecular sieve right adsorption tower and a molecular sieve left adsorption tower, an air inlet of the molecular sieve adsorption tower is communicated with the input electromagnetic valve through a right adsorption tower air inlet gas circuit and a right adsorption tower air outlet gas circuit, air enters the molecular sieve adsorption tower through the input electromagnetic valve, an air outlet of the molecular sieve adsorption tower is communicated with the output electromagnetic valve through a left adsorption tower air outlet gas circuit and a right adsorption tower air outlet gas circuit, and a back-flushing flow valve is arranged between the left adsorption tower air outlet gas circuit and the right adsorption tower air outlet gas circuit; and the left lower pressure equalizing gas circuit and the right lower pressure equalizing gas circuit are respectively communicated with the left adsorption tower gas inlet gas circuit and the right adsorption tower gas inlet gas circuit through input electromagnetic valves. The utility model has the advantages of reducing the air consumption and improving the nitrogen-oxygen ratio.
Description
Technical Field
The utility model relates to a low-consumption high-purity variable-pressure nitrogen making device, belonging to the technical field of nitrogen preparation.
Background
The pressure swing nitrogen production is that air is used as raw material, and the nitrogen and oxygen in the air are separated by utilizing the selective adsorption performance of the nitrogen and oxygen of the carbon molecular sieve. In the existing variable pressure nitrogen system, the nitrogen separation effect of the carbon molecular sieve is mainly based on the fact that the diffusion rates of nitrogen on the surface of the molecular sieve are different, oxygen with a small diameter diffuses fast, and thus enriched components of nitrogen can be obtained in a gas phase. After a period of time, the adsorption of the molecular sieve to oxygen reaches balance, and according to the characteristic that the carbon molecular sieve adsorbs different gases under different pressures, the pressure is reduced to enable the carbon molecular sieve to remove the adsorption of the oxygen. Usually two columns are used in parallel, alternately with pressurized adsorption and decompression regeneration, to obtain a continuous nitrogen flow. The disadvantage of this system is that it is slow to achieve high purity and cannot be used as quickly as desired each time it is turned on.
Disclosure of Invention
The utility model aims to provide a low-consumption high-purity variable-pressure nitrogen making device which reduces the air consumption, improves the nitrogen-oxygen ratio and effectively improves the purity in the nitrogen making process.
The utility model discloses the invention is realized through following technical scheme:
the utility model provides a low consumption high purity vary voltage nitrogen generation device, includes molecular sieve adsorption tower, input solenoid valve, output solenoid valve, exhaust solenoid valve and blowback flow valve, its characterized in that: the molecular sieve adsorption tower comprises a molecular sieve right adsorption tower and a molecular sieve left adsorption tower, an air inlet of the molecular sieve adsorption tower is communicated with an input electromagnetic valve through a right adsorption tower air inlet gas circuit and a right adsorption tower air outlet gas circuit, air enters the molecular sieve adsorption tower through the input electromagnetic valve, an air outlet of the molecular sieve adsorption tower is communicated with an output electromagnetic valve through a left adsorption tower air outlet gas circuit and a right adsorption tower air outlet gas circuit, and a back-flushing air flow valve is arranged between the left adsorption tower air outlet gas circuit and the right adsorption tower air outlet gas circuit; the left and right of the lower pressure-equalizing gas circuit are respectively communicated with the left adsorption tower gas inlet gas circuit and the right adsorption tower gas inlet gas circuit through input electromagnetic valves, and the left and right of the lower pressure-equalizing gas circuit are connected with exhaust electromagnetic valves; the technical scheme is further explained as follows: the molecular sieve right adsorption tower and the molecular sieve left adsorption tower are switched through input electromagnetic valves to realize the analysis and adsorption alternation, and the switching period is 70 seconds; the technical scheme is further explained as follows: the exhaust electromagnetic valve is arranged on the exhaust gas path, and a silencer is arranged at the outlet.
The utility model discloses following beneficial effect has:
(1) the air consumption is reduced, the original nitrogen making ratio of 6:1 is increased to 4:1, the volume of the air compressor is reduced, the total weight of equipment for production is reduced, the cost is reduced, and more choices are provided for the air compressor; the occupied area of the equipment is reduced for users, and the use noise is reduced.
(2) The nitrogen-oxygen ratio is improved, the purity is effectively improved, the original 99.999 percent is improved to 99.9999 percent, and the equipment competitiveness and the market demand are greatly improved.
Drawings
FIG. 1 is a schematic diagram of a low-loss, high-purity pressure swing nitrogen generator.
In the figure: 1. air inlet, 2, input solenoid valve, 3, exhaust solenoid valve, 4, muffler, 5, exhaust gas circuit, 6, left adsorption tower gas inlet circuit, 7, right adsorption tower gas inlet circuit, 8, the left adsorption tower of molecular sieve, 9, the right adsorption tower of molecular sieve, 10, the left adsorption tower gas outlet circuit, 11, the right adsorption tower gas outlet circuit, 12, the blowback air flow valve, 13, output solenoid valve, 14, go up the pressure-equalizing gas circuit, 15, the nitrogen gas export, 16, lower pressure-equalizing gas circuit is left, 17, lower pressure-equalizing gas circuit is right.
Detailed Description
The contents of the present invention will be further described with reference to the accompanying drawings and production processes:
as shown in the figure for low consumption high purity pressure swing nitrogen generator structure picture, including 1, air inlet, 2, input solenoid valve, 3, exhaust solenoid valve, 4, the muffler, 5, the exhaust gas circuit, 6, left adsorption tower inlet gas circuit, 7, right adsorption tower inlet gas circuit, 8, the left adsorption tower of molecular sieve, 9, the right adsorption tower of molecular sieve, 10, the left adsorption tower outlet gas circuit, 11, the right adsorption tower outlet gas circuit, 12, the blowback air flow valve, 13, output solenoid valve, 14, go up the pressure-equalizing gas circuit, 15, the nitrogen outlet, 16, lower pressure-equalizing gas circuit is left, 17, lower pressure-equalizing gas circuit is right.
Air enters the molecular sieve left adsorption tower (8) through the input electromagnetic valve (2), the tower pressure is raised, oxygen molecules in the compressed air are adsorbed by the carbon molecular sieve, unadsorbed nitrogen passes through the left adsorption tower air outlet gas path (10) and enters the nitrogen storage tank (15) through the output electromagnetic valve (13), and the process is called as the duration time of 70 seconds. And when 40 seconds pass, the exhaust electromagnetic valve (3) is electrified and switched, the exhaust gas circuit (5) is closed, after the adsorption process is finished, the left adsorption tower (8) and the right adsorption tower (9) are switched through the electromagnetic valve and communicated through an upper pressure-equalizing gas circuit and a lower pressure-equalizing gas circuit, so that the pressures of the two towers are equalized, the process is called pressure equalization, and the duration is 2 seconds. After the pressure equalization is finished, the compressed air is switched through the input electromagnetic valve (2) and enters the right adsorption tower (9), meanwhile, the exhaust electromagnetic valve (3) loses power, and residual gas in the left adsorption tower is exhausted through the exhaust gas path (5) and the silencer (4), and the process is called as analysis. In the right adsorption tower (9), oxygen molecules in the compressed air are adsorbed by the carbon molecular sieve, the enriched nitrogen enters the nitrogen storage tank (15) through the right adsorption tower air outlet gas path (11) and the output electromagnetic valve (13), and the duration of the process is also 70 seconds. The right column is also desorbing while the left column is adsorbing. In order to discharge oxygen released by pressure reduction in the molecular sieve into the atmosphere completely, nitrogen purges the adsorption tower which is desorbing through a normally open back-flushing flow valve (12) and blows the oxygen in the tower out of the adsorption tower. This process is called blow back and is carried out simultaneously with desorption. And after the right suction is finished, entering a pressure equalizing process, switching to a left suction process, and circularly going on all the time. When the adsorption tower adsorbs for 40 seconds, the exhaust electromagnetic valve is switched to close exhaust, so that nitrogen for back flushing is stored in the other adsorption tower, the pressure is recovered, and the adsorption tower can reach the required pressure more quickly during the next exchange adsorption, so that the consumption of compressed air is greatly reduced; because 40 seconds of blowback are enough to sweep the oxygen in the adsorption tower, so with the high-purity nitrogen recovery of remaining 30 seconds of blowback, be used for promoting the nitrogen-oxygen ratio in the adsorption tower when next absorption, effectively improve the purity.
Claims (3)
1. The utility model provides a low consumption high purity vary voltage nitrogen generation device, includes molecular sieve adsorption tower, input solenoid valve, output solenoid valve, exhaust solenoid valve and blowback flow valve, its characterized in that: the molecular sieve adsorption tower comprises a molecular sieve right adsorption tower and a molecular sieve left adsorption tower, an air inlet of the molecular sieve adsorption tower is communicated with an input electromagnetic valve through a right adsorption tower air inlet gas circuit and a right adsorption tower air outlet gas circuit, air enters the molecular sieve adsorption tower through the input electromagnetic valve, an air outlet of the molecular sieve adsorption tower is communicated with an output electromagnetic valve through a left adsorption tower air outlet gas circuit and a right adsorption tower air outlet gas circuit, and a back-flushing air flow valve is arranged between the left adsorption tower air outlet gas circuit and the right adsorption tower air outlet gas circuit; the left lower pressure-equalizing gas circuit and the right lower pressure-equalizing gas circuit are respectively communicated with the left adsorption tower gas inlet gas circuit and the right adsorption tower gas inlet gas circuit through input electromagnetic valves, and the left lower pressure-equalizing gas circuit and the right lower pressure-equalizing gas circuit are connected with exhaust electromagnetic valves.
2. The low-loss, high-purity, variable-pressure nitrogen generator according to claim 1, characterized in that: and the molecular sieve right adsorption tower and the molecular sieve left adsorption tower are switched through input electromagnetic valves to realize the analysis and adsorption alternation, and the switching period is 70 seconds.
3. The low-loss, high-purity, variable-pressure nitrogen generator according to claim 1, characterized in that: the exhaust electromagnetic valve is arranged on the exhaust gas path, and a silencer is arranged at the outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921532943.3U CN211283733U (en) | 2019-09-16 | 2019-09-16 | Low-consumption high-purity variable-pressure nitrogen making device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921532943.3U CN211283733U (en) | 2019-09-16 | 2019-09-16 | Low-consumption high-purity variable-pressure nitrogen making device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211283733U true CN211283733U (en) | 2020-08-18 |
Family
ID=72033137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921532943.3U Expired - Fee Related CN211283733U (en) | 2019-09-16 | 2019-09-16 | Low-consumption high-purity variable-pressure nitrogen making device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211283733U (en) |
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2019
- 2019-09-16 CN CN201921532943.3U patent/CN211283733U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200818 |
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| CF01 | Termination of patent right due to non-payment of annual fee |